When using the search_api_coveo_keys submodule, and you have configured a key using an environment variable, if that environment variable is not defined (null) a fatal type error is thrown. This causes the site not to bootstrap and drush commands fail.
<pre>The website encountered an unexpected error. Try again later.
TypeError: Drupal\search_api_coveo_keys\RepositoryManager::getKeyValues(): Return value must be of type array, null returned in Drupal\search_api_coveo_keys\RepositoryManager->getKeyValues() (line 32 of modules/contrib/search_api_coveo/modules/search_api_coveo_keys/src/RepositoryManager.php).
Drupal\search_api_coveo\CredentialProvider->getCredentials(Array) (Line: 126)
Drupal\search_api_coveo\Plugin\search_api\backend\SearchApiCoveoBackend::create(Object, Array, 'search_api_coveo', Array) (Line: 21)
Drupal\Core\Plugin\Factory\ContainerFactory->createInstance('search_api_coveo', Array) (Line: 83)
Drupal\Component\Plugin\PluginManagerBase->createInstance('search_api_coveo', Array) (Line: 152)
Drupal\search_api\Entity\Server->getBackend() (Line: 80)</pre>This situation normally won't happen when setting things up locally, because the key module does provide form validation when saving the key. However, this situation can occur when using Drupal's configuration management to synchronize configuration between multiple environments and the environment variable has not been defined in the environment you are styling to.
Active
1.0
Code
Created a patch file from MR to allow patching this issue on my project. It may be helpful for others who run into this issue before it is resolved in a release.